Examine source code of LinkSafer

{
  "manifest_version": 2,
  "name": "LinkSafer",
  "version": "1.1.4",
  "description": "A small extension to manage notes and temporary links",
  "applications": {
    "gecko": {
      "id": "S3R43o3@creativedudes.com"
    }
  },
  "background": {
    "scripts": [
      "js/content.js"
    ]
  },
  "icons": {
    "96": "assets/icon/blueicon_256.png",
    "256": "assets/icon/blueicon_256.png"
  },
  "browser_action": {
    "default_title": "LinkSafer",
    "default_popup": "popup.html",
    "default_icon": "assets/icon/blueicon_256.png"
  },
  "options_ui": {
    "page": "help.html",
    "open_in_tab": false,
    "chrome_style": true
  },
  "permissions": [
    "activeTab",
    "tabs",
    "storage",
    "downloads",
    "notifications",
    "sessions"
  ]
}